LDR Sensor Module

This light sensor module or light dependent resistor module (LDR Module) uses the GL5528 photo-resistor to detect the light intensity of the environment. The resistance of the sensor decreases when the light intensity of the environment increases. The LM358 op-amp is configured as a “voltage follower” to increase the accuracy of this device.

Specifications

• Operating voltage: 3.3 to 5Vdc.
• Operating current: 10mA with 5V.
• Light resistance (at 10 LUX): 8: 2 K
• Status LED indicator.
• Adjustable trigger threshold. Adjust potentiometer clockwise to increase sensitivity.
• Digital and analog output.
• Analog output can be connected to microcontroller analog pin to get light intensity value.
• Rising Response Time:  20ms
• Peak Wavelength:  540nm.
• PCB Size (LXWXH):32.5×1.6x36mm
• Weight: 6g.

Application Examples

• You can make a light turn on when it is getting dark.
• With a laser pointer you can make a cheap intruder alarm.
• Tracking of solar panels to the sun direction for best solar power generation efficiency.